QUALIA Platform

Browser-based perceptual screener and assessor qualification platform for the GN Perceptual Evaluation Team.

GN · Jabra · Internal Research Tool

QUALIA Platform

QUALIA is a browser-based platform for screening and qualifying human assessors before they join perceptual listening or viewing panels at GN. It runs entirely in the browser with no installation and no backend server. All test logic, stimulus generation, and response collection execute client-side via the Web Audio API and standard browser rendering.

Zero install In-browser Web Audio API Adaptive staircase 2AFC / Triangle Quarto R SVG stimuli

Three-layer ecosystem

Power Platform Admin & enrollment
→
QUALIA Screen & qualify
→
DOTTY Run perceptual studies

Tools

dB HL

AudiMap

Pure-tone audiometry

Estimates bilateral hearing thresholds using the Hughson-Westlake adaptive staircase. Tone generation is handled client-side via the Web Audio API. Results export as structured audiogram data for downstream panel reporting.

Hughson-WestlakeWeb Audio API250Hz–8kHz
E ÆŽ E E ÆŽ E ÆŽ E ÆŽ E logMAR

AcuiScreen

Visual acuity screening

A launcher wrapper around FrACT10, the established psychophysical acuity test battery. Supports logMAR estimation, tumbling-E optotypes, and Landolt-C rings. Handles configuration, session flow, and result capture inside the QUALIA interface.

FrACT10logMARtumbling-ELandolt-C

ColorScreen

Color vision screening

A color vision screener built around Ishihara-style plates generated as SVGs natively in the browser. Avoiding raster image assets ensures reproducible stimulus presentation across display types and resolutions.

SVG platesIshihara-styleClient-side
A B

AuQAS

Audio quality adaptive screening

Estimates a candidate's sensitivity to audio degradation using 2AFC and Triangle test paradigms. The staircase procedure is configurable in step size, reversal count, and starting level. Results yield a per-assessor quality sensitivity threshold prior to panel admission.

2AFCTriangle testAdaptive staircase
CRF

ViQAS

Video compression threshold screening

A 2AFC descending staircase over H.264 Constant Rate Factor levels. Candidates compare compressed and reference video clips to identify the degraded stimulus. The procedure converges on a per-assessor compression visibility threshold.

2AFCH.264 CRFDescending staircase
Quarto/R

Analysis

Quarto R panel reporting

A Quarto R report template for panel-level qualification reporting. Generates audiogram overlays, threshold distribution plots, and pass/fail summaries across assessors. Reports render to HTML and PNG for archival and review by the evaluation team.

Quartoggplot2Audiogram overlayPNG export

Design rationale

Zero deployment

No server provisioning, no software installation on assessor machines. The full screening session runs in any modern browser, which makes remote and distributed qualification practical without IT coordination.

Reproducible stimuli

SVG-based visual plates and Web Audio API tone synthesis produce identical stimuli across sessions independent of display hardware, audio drivers, or operating system. No raster assets, no playback variability.

Adaptive efficiency

Staircase procedures throughout converge on individual perceptual thresholds without requiring fixed, exhaustive stimulus sets. Qualification sessions stay short while producing statistically grounded threshold estimates per assessor.

Ecosystem fit

QUALIA sits deliberately between Power Platform (enrollment) and DOTTY (study execution). Qualification records flow downstream without manual handoff, keeping the panel lifecycle traceable from admission to test completion.

QUALIA is not intended for external use or commercial deployment. It is qualification infrastructure for the GN Perceptual Evaluation Team, supporting the panel lifecycle across listening and viewing research at Jabra.